79278511 has 16 divisors (see below), whose sum is σ = 87314080. Its totient is φ = 71539200.

The previous prime is 79278509. The next prime is 79278523. The reversal of 79278511 is 11587297.

It is a cyclic number.

It is not a de Polignac number, because 79278511 - 2¹ = 79278509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79278581) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 131611 + ... + 132211.

It is an arithmetic number, because the mean of its divisors is an integer number (5457130).

Almost surely, 2^79278511 is an apocalyptic number.

79278511 is a deficient number, since it is larger than the sum of its proper divisors (8035569).

79278511 is a wasteful number, since it uses less digits than its factorization.

79278511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 826.

The product of its digits is 35280, while the sum is 40.

The square root of 79278511 is about 8903.8481006810. The cubic root of 79278511 is about 429.5876902306.

The spelling of 79278511 in words is "seventy-nine million, two hundred seventy-eight thousand, five hundred eleven".